S-90337A333 1/4"-20 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Precise component alignment ensured by the 3/8" shoulder diameter with tight tolerance for reliable machinery assembly
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Easy installation in confined spaces using the low-profile socket head with standard 3/16" hex drive
- Quick assembly efficiency with coarse 1/4"-20 UNC threads and Class 2A fit for rapid, secure fastening
- Enhanced durability and longevity from the smooth head texture and right-hand thread design reducing wear
- Compliance with global standards including RoHS 3 and REACH for safe, sustainable industrial use
Professional Applications & Engineering Value
This precision shoulder screw addresses critical alignment challenges in machinery, automation, and precision equipment. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to corrosion and chemicals, extending service life in demanding conditions. The 3/8" shoulder diameter with precise tolerance ensures accurate positioning of moving parts, reducing vibration and misalignment issues. With a low-profile socket head and hex drive, it allows easy access in tight spaces, while the 1/4"-20 UNC coarse thread enables quick installation without compromising holding power. Ideal for industrial applications requiring reliable, repeatable fastening with minimal maintenance.
Specification Summary & Compliance
The screw features a Class 2A thread fit for standard industrial use, with a shoulder diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002" ensuring consistent performance. It adheres to UNC thread standards and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible sourcing and usage in global markets.
